PLATE XT. 
Pig. Pngo 
1. Ili/hndm poli/p)'io», Apjassiz : hinrlcr tooTL, outer aspect. — 
Stonesfield Slate ; Stonesfield, Oxford. [39203.] 2G0 
2. Ditto ; tooth, outer aspect. — Ibid. [11124.] 209 
3. Ditto ; tootli, outer aspect. — Ibid. | P. 2845.] 20T) 
4. Ihjhodus r/rnssiconiis, AgiiHHi'/,; tooth, outer aspect. — Il)id. 
[28590 a. 1 271 
5. Hi/ltodtis levin, sp. nov. ; tooth, outer aspect, twice nat. 
size. — ll)id. 1 33474.] 270 
0. Ditto ; tooth, inner aspect, twice nat. size. — Ii)id. 
|P. 2182d.] 270 
7. Ditto ; tooth, outer aspect, twice nat. size. — Ilnd. 
[P. 2845 c.] 270 
8. Ilyhodvn ohi.unan, Agassiz ; tooth, outer aspect. — Kimme- 
ridge Clay ; near Weymouth. 1 41223.] 273 
9. TO. Ditto ; two teetli ; outer aspect. — Dnd. [41875.] 273 
11. Ditto ; tooth, inner aspect. — Ibid. [43569. | 273 
12, 13. Ditto ; two teeth, outer and inner aspects. — Ibid. 
[45927.] 273 
14. Hifhodm (cf. strialuhis, Agassiz) ; tooth, outer aspect. — 
Wcaldon ; Tilgate Forest, Sussex. [25026.] 270 
15. Ditto ; tooth, outer aspect. — Ibid. | 2693.] 270 
10. sp. ; tooth, outer aspect. — llhd. [28420 a.] 277 
17. Sipiechodun dHhrisu!nsis('ShicY\e); anterior (? upper) tooth, 
outer aspect, three times nat. size. — Challc ; Ivont. 
141675.1 328 
18, 19. Ditto ; two associated teeth, outer aspect, tlireo times 
nat. size. — L. Clialk ; Dover. [47287 ] 328 
20. Ditto ; hinder tooth, outer aspect, tliree times uat. size.— 
Chalk; Ivent. 1 41675. i 328 
21. Synechodas tenuin, sp. nov.; anterior tooth, outer aspect, 
three times nat. size. — L. Gretmsand ; Maidstone. 
[9297.]' 329 
22. 23. SynechnduK reeurvnx (Trautsehold) ; two teeth, outer 
aspect. — Gault ; Folkestone. [47220 a. b.] 330 
24, 25. (Jentradon ennaUadatns, Egerton ; two associated ante- 
rior teeth, outer and inner asi)ects, three times nat. 
size. — U. Chalk ; Guildford. [49735.] 334 
20, 2<. Ditto; associated lateral teeth of the same specimen, 
coronal aspect, twice nat. size. [49735.] 334 
28. Centrndm, sp. ; lateral tooth, coronal aspect,— Gault ; 
Folkestone. [47293 a. | 330 
29. Cenlntdon riiynniin (Agassiz) ; lateral tooth, coronal aspect. 
—Chalk ; Lewes. [4166.] 335 
